localhost:1880: what runs on it and how to open it
Port 1880 is the default editor page of Node-RED. How to start it and fix errors.
Open this address: http://localhost:1880This opens on your own computer. It only works if the program is running.
localhost:1880 is the Node-RED editor. You start Node-RED from a terminal and then open the address in a browser to wire flows together.
What runs on localhost:1880
- Node-RED, the flow-based programming tool
Commands to start and test port 1880
npm install -g --unsafe-perm node-rednode-rednode-red --port 1881Find what is using port 1880
Run these in a terminal on your computer. Nothing is sent to this site.
If localhost:1880 will not open
- The editor is open to anyone on the network
- By default Node-RED has no login. Turn on adminAuth in settings.js before you make it reachable from other devices.
- Port 1880 is already in use
- Another program is on this port. Find it with the tool below and stop it, or start yours on another port.
- This site can’t be reached (ERR_CONNECTION_REFUSED)
- The program is not running. Start it and keep that terminal open. See the full checklist.
- Works on your computer, not on your phone
- Start the server on all network addresses and use your computer’s IP address. See how to open localhost from your phone.
Other ports like 1880
| Port | Usually used by |
|---|---|
| localhost:11434 | Ollama (AI models) |
| localhost:5601 | Kibana |
| localhost:11501 | Not a standard port: check what is using it |
| localhost:9200 | Elasticsearch |
| localhost:5672 | RabbitMQ |
| localhost:15672 | RabbitMQ admin page |
| localhost:9090 | Prometheus |
Questions about localhost:1880
- Where are my flows stored?
- In a flows.json file inside the Node-RED user folder, usually .node-red in your home folder.
- Is localhost:1880 safe?
- Yes, as long as it stays on localhost. Only your own computer can reach it. It becomes reachable from other devices only if you start the program on 0.0.0.0 or your computer's IP address. Do not put development or admin tools on the public internet.
- Can I use a different port instead of 1880?
- Yes. Most programs let you choose the port with a setting or a command option. Pick a free port above 1024 and open that number instead.
- How do I check what is using port 1880?
- Use the port checker on this page. It shows the command for Windows, macOS and Linux and does not send anything to this site.
- Can I open localhost:1880 from my phone?
- Yes, if both are on the same Wi-Fi. Start the program so it listens on all addresses, then open your computer's IP address with the port on the phone. A firewall on the computer can still block it.
Free tools that help
- Common ports listSearch a list of common TCP and UDP port numbers: SSH 22, HTTP 80, HTTPS 443, MySQL 3306, PostgreSQL 5432 and more, with dev server ports.